Cowl



g- 1941- D. FRIEDMAN COWL 5 She ets-Sheet 1 Filed March 8, 1940 f 0 I n e w I 202222. 2 flrz'e'dzvza n 1/ A llorney Aug. 19, 19 D. FRIEDMAN COWL Filed March 8, 1940 I59. v.2 Z6

3 Sheets-Sheet 2 Inventor azizz'ezm'ednzalz flwmih A Ilorney Aug. 19, 1941.

D. FRIEDMAN 2,253,117

COWL Filed March 8, 1940 3 Sheets-Sheet 3 In veni or 3312 22 2 Trzdamza 4/ pmm A Home y Patented Aug. 19, 1941 UNITED STATES PATENT OFFICE COWL 7 Daniel Friedman, Chicago, 111; Application March 8, 1940, Serial No. 323,004

Claims. (Cl-x9870) This invention relates to a cowl or ventilator for chimneys, stacks and the like, the general object of the invention being to provide a cowl which can be manufactured to sell at low cost and which will work under practically all conditions asit is provided with means at the front for preventing the entrance of gusts of wind which might be directed against the front part of the device when the same is facing a high wall or for any other reason.

Another object of the invention is to provide means whereby the device can be adjusted to suit chimneys or stacks of different diameters and also to provide a passage along the top of the device for the passage of air which will cause a suction in the stack or chimney.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claims.

In describing the invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which:

Figure 1 is a vertical sectional view. of the device showing the same placedon a stack.

Figure 2 is a top plan view of the device.

Figure 3 is a view looking toward the outlet f end of the device. I

t Figure 4 is a bottom plan view of the cowl.

Figure 5 is a View similar to Figure 3 but showing the cowl alone.

Figure 6 is a view of the blank from which the;

cowl is formed.

Figure 7 is a view of the ring support and its tubular bracket.

Figure 8 is aside view of this ring member.

Figure 9 is a view of the rod supported by the bracket and the ring member and which rotatably supports the cowl.

Figure 10 is a view of the blank for forming the deflector member.

The body part of the cowl is formed of a blank. B shown in Figure 6 which has its lower edge of substantially arcuate shape with projections I at the junction of the side edges with the'lower edge and with the side edges converging and the .top of the blank is formed with a substan- I.

tially crescent-shaped opening 2 and said top being cut away to provide flat ends on the projecting parts 3 formed by the recessor opening 2. This blank is bent to place the ends I opposite each other with their terminals overlapping and connected together as shown at I and these ends charge end to the inlet end and with the. parts 3 overlapping at the rear and connected together as shown at I and these parts forming a rounded end which is spaced from the adjacent end of the rounded top to leave an opening 8 for the inlet of air. A plate 9 has one end bent over the bottom wall of this opening 3 as shown at I0 with the plate extending from one side part of the curved top 6 to another side part so that the plate forms a passage between itself and the rounded part of the. top 6 with the upper end of the plate or free end thereof extending upwardly and forwardly as shown at II to provide a lip directing the air passing through the passage upwardly before passing from the cowl. A metal bracket I2 has a depending part connected by a fastening means I to the inlet end of the cowl with the bracket extending under the plate 9 and having its inner end bent downwardly as shown at I3. A second bracket I4 is connected to the top of this plate 9 and to that part of the bracket I2 which engages the plate by the bolts I5 and this bracket I4 has an upwardly extending portion which extendsprac- .tically to the top 6 and is then bent first into substantially U-shape as shown at I6 and then into angle shape as shown at H, the lower limb of the angle part IIand the lower limb of the U-shaped part I6 having holes therein for receiving a short supporting member and the plate 9 is also provided with a hole for the passage of this supporting member. Furthermore, a transversely extending bracket I8 extends under the plate 9 and has a hole therein for the support member and the ends of the bracket I8 are bent downwardly and connected with the. side portions of the cowl by the bolts I9. Thus the parts of the cowl and the plate 9 are firmly connected and braced.

A split ring 20 is adapted to be placed ona chimney or stack S and to be fastened thereto by bolts or rivets 2 I. This ring is made of bendable material so that it can be adjusted to suit the diameter of the stack or chimney on which it is placed. 7 An upwardly and inwardly extending tubular member 22 has its lower end flattened and connected with the ring opposite the opening in the ring, as shown in Figure '7 and an angle bar 23 is adapted to be placed in the upper end of this tubular member and to be held in adjusted position therein by a bolt 24 passing through a hole in the tubular member and any one of a plurality of holes 25 in the bar 23. The parts are so arranged that the upper limb 23' of the bar will remain in upright position no matter which hole 25 the bolt 24 is placed in. The upper end of the bar 22 is pointed as shown in Figure 9 and this part 22' is adapted to be passed through the holes in the parts l1 and Hi and the holes in the brackets and plate 9 and to rest against the upper limb of the part It so that the cowl is rotatably supported by this member 23 and the member 22. By having the member 23 adjustable in the member 22 the member 23 can be adjusted so that it will be cene tered in respect to the stack S as the ring 20 is adjusted to fit the stack.

. vided that such changes fall within the scope of the appended claims.

Having described the invention, what is claimed as new is:

,l. A .cowl device of the class described com- "prising a supporting member adapted to be con- As shown in Figure lvthe opening 4t inthe bottom of ithecowl is larger than the external diameter oftne stack so as'to leave a narrow space between-them. l

, A vertically arranged vane26 is fastened to the center of the top, of the cowl to keep the co-wl inkthewind or in a position where the wind will enter the opening 8 and pass between the plate Slahdtthe top of the cowl and then will pass out through the large end of the cowl so as to create a suction 'or draft-in, the stack to facilitatethe passage'o-f smoke and gases therefrom and also 'to increase the draft of thewstove or-furnace connectedwiththe stack. i

I' alsqprovide a. deflector-"21 at theoutlet end 'of the. cowl which is connected by the bars 281 iwith the lower part of the outlet end 'of the cowl and aMplate-like member 29 connects the top part of the deflector ZTWith'the vane 26 by havingfa UEshapedpart 30-fittingover the front edge of the vane and connected thereto by rivets "3| or, the like This deflectorcis formed of a substantially semi-circular blank shown at 21 in FigurelO with a portion of, itsrim bent outwardlyj and'upwardly asrshownlat 32 and the internal "part of the blank is of arcuate shape and @flaresoutwa'rdly and downwardly as shown at 33. From the foregoing itwill be seen that when "the device is 'supportedjat the top'of'the stack "or'chimney byithe'. ring and the members 221 a'ndjj'23. the jcowliwith'the parts'attached thereto canr otateandthe vane' 26 will keep the cowl in. atpofsition so that the wind will enter the op'enin'g'B and pass through the'passage formed by 'th'e p late 9 and the top'of the cowl and then through the large end of the cowl, the wind being forced 'upwa'rdly'and'outwardly by the lip ll of Lthejp late As before stated, this will cause suction to take place in the chimney or stack. I fjfor any reason thereshould be a gust of wind directed toward thelarge end of the device whichprdinarilywOuld enter the device and pass down the chimney to interfere withfthe draft ,and possibly blow"smokeand gases from the .Istove'intoj the building; such wind is prevented fromentering the device by the deflector 121 as some of the wind striking this member would be deflected; downwardly and outwardly-away from the co wl and some'of itmight be directed upwardlyj and 'goutwardly and 'sidewise by the part 3 2.,-In any; event very little ifgany of the wind would enter the-device. i

is useful where the cowl is'placed on a stack or chimney located adjacent a tall building for in 'thi s case there is a possibility of a "high wind striking the building and then being neoted' to a stack or chimney top, a cowl body rotatably supported from said member and including a large outlet opening at one end and a small-inlet opening at the other end, a plate spaced from'the'top of the cowl and forming a passage between itself and said top which is in communication with the inlet opening, a vane at the :top of *the cowl for holding the device in a position with the smalliinlet opening facin'gthe wind and a deflector memberat the outlet end of the cowl for preventing air flowing into said outlet opening, meansfor supporting the deflector 'member in spaced relation from said end of the body which has the outlet opening therein and said deflector member having its major semen 'sloping-downwardlyand away from the body and a flange portion sloping outwardly and upwardly from the topand sides of the major portion.

21 Acowl devic'e'of'the'classdescribed comprising a body having a large opening in its bottom; straight isides iand an arcuate top' which s'lopesfrom one end to the other end,an end piece at said other end spaced from'the'top to -forrn-an inlet opening,a platespaced from the top andf'orming a passage between itself and said top; said space being in communication with cowl body for holding the cowl withthe end hav- F ing the inlet opening thereintoward the wind, a deflectorgbar members connected with the body for holding the deflector-inspacedrelation to the large end of the cowl body; saidadeflector being formed with flaring parts for deflecting the wind away from the outlet end'of the body. 3. A 'cowl device of the class described comprising a body having a large opening in its bottom; straight sidesland. an arcuate top which =slope's from one fiend-1 to Ithe'other"end,;an end "piece at said otherend spaced! fromthetop 'to form an inlet opening, a plat'ezspaced fromthe top and forming a passagebetween itself and saidtop, said space being in communication with "the inlet" opening, abracket connected with the pl-ata'a'nid with parts of the cowl body, alsupportingmember rotatably "engaged by the bra'cket f a vane extending from the Stop of the cow body for holding the cowl with the .end "having the inlet opening therein toward the "windfja deflector, bar'members connected with the body for holding the deflector in spacedrelation tothe large endof the cowl body, said defie'ctorf being formed with flaring parts -for1de- -def1e'cted thereby into the device This deflector fle'ctingIthe wind away from the outlet end of the body, said cowl body being formed of a single piece of material.

4. A cowl device for the upper end of a stack or chimney comprising a split ring expansible for fitting difierent sizes of chimneys or stacks, a tubular bracket extending upwardly and inwardly from a portion of the ring, a rod bent to provide a straight upper portion vertically arranged and a sloping lower portion, said sloping lower portion having a sliding fit in the tubular member, means for holding said lower portion in adjusted position in the tubular part, and a cowl body rotatably supported by the straight vertical part of the bar.

5. A cowl device for the upper end of a stack or chimney comprising a split ring expansible for fitting different sizes of chimneys or stacks, a tubular bracket extending upwardly and inwardly from a portion of the ring, a rod bent to provide a straight upper portion vertically arranged and a sloping lower portion, said sloping lower portion having a sliding fit in the tubular member, means for holding said lower portion in adjusted position in the tubular part, and a cowl body rotatably supported by the straight vertical part of the bar, said body having an opening in its bottom fitting over the upper end of the stack or chimney with straight sides and an arcuate top which slopes from one end to the other, a wall forming part closing said other end of the cowl body and said wall forming part having a small opening at its top, the other end of the cowl body being open, a plate in the cowl body spaced from the top and forming a passage between itself and the top for the passage of air entering the small opening and a bracket in the cowl body having holes therein for fitting over the vertical part of the bar and a bearing part DANIEL FRIEDMAN. 

